Resilient wheel



Jam. 9, 1923.

35 WITNESSES M. T. WESTON.

RESILIENT WHEEL.

FILED JAN.30,19I9.

5 SHEETS-SHEET 1..

M. T. WESTON. 1

RESILIENT WHEEL.

'FILED ,IAN.30,1919- Jan 9, 1923..

5 SHEETS-SHEET a.

M rm.

' I!" M. T WESTON. Z'

RESILIENT WHEEL.

FILED JAN. 30. 1919.

5 SHEETS/SHET 4.

O Jan. .J, 1923. M. T. WESTON 1,441,953

RESILIENT WHEEL.

FILED JAN. 30, 1919. 5 SHEETS-SHEET 5.

i f fgig i MAM Tic LE 0 lie licetieu filed January EM 1919 t erial l lo. we.

To oil 410/: one may novice m1 it ltnown that l. Ev xron ll.

i atea-i cit zen of the ilnited to York county and bltete ol: i I

in new and usetul liober 155389586, which Wes rated to me on .lfleccniber 31st 1918 and on "which the oresa J .i

ent invention constitutes an improvement, the relatively movable axle and tread units are pivotally connected by articulatec pausible connections which are ei abled to properly transmit torque from one unit to the other by means of said resilient member or pneun'ietic tube which in all operative 'iositions ot the (bile and tread units maintains a, substantially equal resilient force against all of spiel eupansible connections. (the object oi? In present invention is an l ri'ived (fUllSlllllUtlOll and rz-iugqei ent oi parts in the Wheel described and claimed in the ebove idmtiiied patent to increase its ellicieuey and durability as hell es its speed and loednavqving; capacity. ln to ollier ater resistance to torque and iltll ltll'tlll'fi from concentric position be tween the axle and tread units, without at the mine time increasing the pressure of the air in the pneumatic tube, ineens ere provided for permanently maintaining said tube with a flattened cross section so as to reiulera larger pressure area available for resisting the movements of the ezqaansible connections which pivotally connect said units. inasmuch as the radial space occupied by the tube is considerably reduced om what it would occupy with a circuler cross section, it will be understood that a pneiuuatic tube oi? larger cross section With its increased total air capacity is made available without increasing; the sir re of the wheel which is thereby enabled to carry it g eater load and to better transmit torque il..0kl1 one unit to the other. The improved I; v other 'l'eatures oil conscriiictional details will pc relationships in the lu the is shown a pre- '1 embodinrem otmy invention.

* "s an axial section thru the icingshown in elevation;

perspective view of one of inino; caps removed; is a milar perspective view of i removed; a perspective view from the A, of th' reniu'ivable cap which closes the oning in the outside Web of the ii ista elevation of the en end levers, showing one of the parts when the unit is depressed with retreacl unit.

SOlllBlVl'lril similar View, broken away and parts shown parts hour in section l igg re is a side elevation of one pair .5 rerun ed, parts being brokenavvay and per. iho'ivn in section;

l igure J ot com rec t a. side elevation or links removed; l igruie side elevation of the lockrinpg [ire it has been secured to the periphery of the outside web;

10 E side elevation oil the frame supports to." join-nailing and the rings et either supports; i section on the line litll being}; shown in elevation;

one p air 7 rue einbmliment oi ni invention shown on the drawings a iloatina; live axle l carrice at its outtu' end a star Wheel or plate 2 provided with fiei'ipherullv spaced segments li posed interiuediately oi the which ure 4.

ouuulur l on the inner surface of a cyor which constitutes an en- Ill of a cylindrical Wall 6, which hub oi? en. 1 xle-ergeging unit which runs on the liinken, rollers 7 mounted in suitable rscevvays on the dead okle Said an engraving; unit also inclulilcs peripheral spaced groups of bearing lugs 9, the lugs of each group being alined parallel to the aXis of the wheel. EX- tending thru each group of lugs 9 a pivot. pin 10 which is preferably made hollow to contain any suitable lubricant. Referring now to fi 'ures 5 and 6 it will be seen that a pair of links 11 are coaxially pivoted at their inner ends in each of the group or" lugs 9, said links preferably having the form shown in Figure 8. Thus, each link 11 is provided with axially spaced pivot hubs 12 which are alternately arranged along the pin 10, the pivot hubs of one link being separated from the adjacent pivot lugs of the other link by means of the radially disposed bearing lugs 9. On their outer ends they carry axially spaced pivot bearings 13 which are symmetrically disposed with respect to a common central plane and journalled on the pivot pins l-l shown in Figure 7, said pivot pins l-it being carried in the spaced pivot bearings 15 of the levers 16. It will be understood, therefore, from an inspection of Figures 7 and 8 that the links 11 are all preterably similar in construction and the links of each pair are interchangeable since either one may be used in place of the other by merely reversing its position. This construction is of great convenience in manufacturing the wheel. The levers 16 are provided on their other ends with spaced bearngs 17, by means of which they are journalled on a hollow post of support 18. These hollow posts or supports 18 upon which the lever 16 is journallech are arranged substantially in radial alinement with the pivot lug groups 9 respectively. As shown in Figure 11, the posts or supports 18 are mounted in a ring 19 which constitutes part of a tread unit extending around and movably connected to the axle-engaging unit by means of the levers and links, just referred to. An outer ring 20 which is provided with suitably spaced holes to adapt it to fit over and unite the outer ends of the posts or supports 18, is secured in, position by means of screw caps 21 which can be removed at will to permit the parts to be assembled or dismantled. Pivotally mounted on each of the pins 14: is a shoe 22 which is preferably constructed of sheet metal and has its lateral edges curved inwardly to adapt it to have rolling contact on the inner surface of a flexible band 23. A shoe 22 is also provided with inwardly deflected lugs 25% and intermediately spaced lugs 25 by means of which said shoe is pivoted on the pin 14L. These lugs are shown in section in Figure 7 and in the assembled structure, are interposed between the pivot hubs 13 of the links and the pivot hubs 15 of the levers, a simple and eflicient device being thereby provided for securing elongated bearings on the pivot axes which. extend transversely to the plane of the wheel. This construction adapts the wheel to withstand the shocks and strains which tend to warp it. On each of the outer posts or supports 18 is mounted an anchoring cap 26 (see Figu e 2) which is provided along its lateral edges with clips 2T adapting ii to grip the post l8. Cylindrical fl: nges 28 at either end ol the cap 26 have supporting engagen'ieut with either said post or the circular bosses on the ring 19 in which said posts are mounted. Said cap provided with a centrally depressed portion 29 which forms a box for ou gaging the support 18 between the pivot hubs 17 of the lever 16. Adjacent either end. said cap is provided with :1 lug 30, raid lug serving to locate the flexible band 23, hereinbet'ore referred to. This band 23 constitutes in effect a portion of the resilient member which opposes the departure of said axle and tread units from concentric position and also serves to transmit torque from one of said units to the OLlIGI either for driving the wheel or for braking the same. As pref r ably constructed, this resilient member in the form of a pneumatic tube 31 which constitutes an iin 'irovcmeuton a somewhat similarly placed pneumatic tube shown in in prior Patent. No BS9586, granted December 1st 1918.

As shown in Figure l, the llexiblc band 23 has considerable axial extent, and provides a broad coniinin; 3 surl'ace with respect to the tube ill which is tlattcned transverscly between the l'lenible member or the llexible band 23 and a flat arched seat 132 For the outer periphery of said tube ill. The area of contact around the inner and outer pc ripheries oi? said tube 31 being}; thus gigrezuly increased the total pressure which is made available by this tube is vei' coushlcrzbly multiplied \vitl'iout increasing the pressure of the air within the tube. Said tube lll1(%l(- fore constitutes an inipi'oveuieuct oici (be similarly disposed tube ol the abovenieutioned patent The seat 22 i prii'u-ipally supported by an annular web ltl which presented inwardly from the rim .l on which is mounted the tire a5. Au :iuuular web 36 connects said rim to the ring; 15) while another annular web 37 has its outer periphery couuecljcul by bolts El? to said rim 341. A ring 38 is connected by spot weld lo the inner edge of the web 3.7, These parts are secured together by means of the web or closure shown in Figure 4; which comprises a metallic plate 39 provided with a peripheral flange 40 which limits its inward displacement and a number oil segmental tlan 'es 4 1 which are adapted to pass tlu'u COllQSPOIlCllHQI segmental recesses 42 termed in the inner periphery of the ring 20 After insertion, the cap thou rotated until its segmental flanges 4-1. her-owe locked bchiud the segmental flanges 43 formed on the inner edge of ring 20 the parts beingthereby sealed. It will be understood therefore that llll lll') i l-Lillie the Web l'i ierezl'dily removed by renewing the eenter Web or closure (shown in 4t}, end tehing the nu s, from the bolts 57. This makes the pnEtllHfltlC tube i medizrtely eeeeesible and in :teet exposes the entire inner n'ieeiuin olh oi? the Wheel. In the center ol? the cap 239 is provided J. Window l thru 'wliiel'i may be observed it pointer lby u eep l-(l wh ch clos s the outer end eyiihdrleztl Well 5" three the pointer tr e of the Ino'venie otthe axle-i un While the window purtzrlt-ze o iuovenieefit oi the tread unit the position elf thepo'inter 135 in the wjiijidow e leerree to indicate therelzitive deperture oi? said units from noifnuilw t brake drum 53i carried an annular plate 428 is rxiountad on the extension 49 oi the eylindri ittl well G or the ui'iit, being; preferably seeured to said elite, unit by means oi e series oil? holte or tl like, which tlrru 1 ried tl e phue 21nd iieently disposed ugrs 9. The plete ll) 1 pro nded on rte outrvzrrdly present d eur'li'e v with e sheet elf metal WllLCh hus eeuh eontuet with an enitiuhir peeking strip Wlueh 1e moutned 1n. the N3 W A is e, preeti cal detail, it in be noted that eueh perte dt m1 Sat at" lo 0 "wt, i +1 w W t e olLL inter We as u it seer run ou rel parts, ey be secured in their several relief tions in spot Wtllillllfi as indiauted at e in 7 l lgrure 1.

The gei'ierztl nrinei gile of operation of my in'iproved wheel. is;- ex

iietziutielly similar to tlurt of my above ientiilied @n'ior )i'l lkillll, there being): however several iin or' not dereloeniente in the practical edap' itien elf my invention to render it more serviceable end ellieient and. to broaden its field of use l fulneesi Thus, in applying etltrttcmed pneuinetie tub to peril in th unetions it u resilieut member between the utirely ruovubl-x axle and tzi'eird uni s not on is there tweeter total pressure utilized in i'ise'liui WOXT' than is available with u tube he ring}; a. round cross section and equal eir capacity, but at the same time it beeoni possible to meet the demands of i'iiotor truck service in that the total amount of pressure in the resilient member is made suilioiently high Without increasing the overall diameter oi the Wheel At the szune time the ell'eet re-i iieesl of the levers which oppose a, departure ol? said eleu'ients from :oneentrie re zrtion and transmit torque from one unit to the other is inereeeed in eorreeneeding; t 0;.'lflt:t This in turn makes it possible to eeeure e more efi eetire brziltii'igr eetion from :i broke druui mrriel by the :wdeengeqine unit lin the derelopnient of trucks for her-ivy trellie, it

has been found necessary to resort to various devices for securing the ueeessr y refiiereembeen USE eqzped. thei r i uh e rent 1' "ewbiieire eoun nietic tube er air nerieurr within the tire in some oil l have been 4 rentzigree r l l ed Wit the use or 21 pneutiiietion liiedeptiin eon r the p nt rventioiu to the n 1 e7: eervie it lure be e try it t r i there in.

mine d. or triple tubes for total pressure oil res In our-wine out the pruetieel. to the utlllZlillOjl oil" the i: sure ere-2i in eenncwtiou with linlre the pressure trrnisnii pivotully nieui'ited on eiiid ably liorined to provule movement ever t 1e ulterior H bend or res'lieut inernher dourthe series 01 equi' C1 u :3 of Whit: tltiese urn; 1' 'tulte, In addition to certain r'nstruetionel features l'iereinbeitore (lessened, by e ting]; the outer periphery of the pneurnetie tube upon a flattened ereh worried by the inner peripheral edrge of :in unnular i it becomes 15M ble to UJMZJVQ'R the einiie contents of the dustnoo't ohmnber torn ed l l. WCilS oi? This wheel. rzrl or a 1iewheel center eulesi on one structure auupteble to on ii mountable rim. d the the brel-ce druu side he and the other side by the (Np or closure w rel :rusebl r securce the .1191 periolierel oil the Web to the ring); Whi looks the outer ends of the posts or SHPPUIHIS on h 'i i swing; in eoexizil pr l i: posts or support serr unpeeitelr disposed side wall unit While at the seine tii'ne gournzds tor the ooaxiullr mounted pit: he o: the

paired l vers.

Referring now to Figure 13 my invention is Shown in its peculiar adaptability to the physirrtl and eoue :uetioniil requirements of truck Wheele, J ceordiiug to this embodiment 011? my invention a solid riin 52 serves to mount the double tire 53. Extending around the lateral periphe e1 edges oi the rini end eeeured the, to in any suitable malnren are the zini'iulur reeniioreeinents 55 which serve to secure the \VBlIlH 5 11 in position, the flattened pueiunutie tube 56 is confined between the lttG/lilliji extended run 522 and band fifrchieh extends around the caps and shoes (not shown on this figure) which are supported by the erticuleted links and levers in e nmnner similar to that here inbefore described. By thus confining the inner and outer peripheries of the pneunietic tube. it will be seen that the resilient pressure support between the axle-engaging and tread units is made equivalent to that available in connection with a tube of much larger size and having a substantially circular cross section. Not only is this so but I have ascertained by extended experimental use of an automobile wheel embodying a flattened pneumatic tube between articulately supportedaxle and tread units and running under actual service conditions, that a much lower pressure may be economically employed.

I claim v 1. In a resilient wheel, an axle-engaging ,unit, a tread unit extending around said axle-engaging unit, means connecting said units and permitting relative movements between said units in the plane of said wheel, means carried by said tread unit for seating a pneumatic tube, a pneumatic tube seated around its outer periphery against said seating means, and means bearing against the inner periphery of said pneumatic tube and movable by and relatively to said units connecting means by the relative movement between said units. r

2. In a resilient wheel, an axle-engaging unit, a tread unit extending around said axle-engaging unit, means for movably connecting said units, means carried by said tread unit for seating the flattened outer periphery of a pneumatic tube, a flattened pneumatic tube seated in said seating means, means carried by said tread unit for engaging portions of the inner flattened periphery of said tube, and a series of shoes engaginging other portions of the inner flattened periphery of said tube, said shoes being movable relatively to said inner periphery engaging means by said units-connecting means.

8. In a resilient wheel, an axle-engaging unit, atread unit surrounding the same, said tread unit being provided with means for seating the outer periphery of a pneumatic tube and with portions engaging said tube at points spaced around the inner periphery thereof, a pneumatic tube provided with flattened inner and outer peripheries, said tube being disposed between said outer periphery seating means and said inner periphery engaging portions, shoes bearing against the flattened inner periphery of said tube, and means movably connecting said units and moving said shoes relatively to the outer periphery seating means.

LIn a resilient wheel, an anXle-engaging unit, a tread unit surrounding the same, said tread unit having a seat for the outer periphery of a pneumatic tube, a series of supports carried by said tread unit at fixed distances from said seat, a pneumatic tube disposed between said seat and said supports, means movably connecting said units, and shoes arranged around the inner periphery of said. pneumatic tube and connected with said units-connecting means to swing about said supports and about axes oscillatable about suit. supports.

5. In a resilient wheel, an axle-engaging unit, a tread unit surrounding the same, said tread unit having a seat for the outer periphery of a pneumatic tube, a series oi supports carried by said tread unit at fixed distances from said seat, a pneumatic tube disposed between said seat and said supports. levers pivoted on said supports, links pivotally connecting aid levers to suio axle-engaging unit, and shoes movable relatively to said lei'ers and transmitting pressure to the inner periphery oi said pncunuitic tube.

6. ln a resilient wheel, an tIXlOrOHQfHglDQ unit, a tread unit surrounding the same. said tread unit having a seat for the outer p0 riphery of a pneumatic tube, a series of supports carried by said tread unit at fixed distances from said seat, a pneumatic tube disposed between said seat and said supports, a pair of levers coaxially pivoted to each of said supports, a shoe movably connected to each of said levers and actuated thereby to exert pressure against the inner periphery of said pneumatic tube, and links respectively connecting said levers to said axle-engaging unit.

7. In a resilient wheel, an axle-engaging unit, a tread unit surrounding the same, said tread unit having a seat for the outer pcriphery of a pneumatic tube. a series oi supports carried by said tread unit at fixed distances :irom said seat, a pneumatic tube disposed between said seat and said supports, a pair of levers coaxially pivoted to each oi said supports, a shoe niovably connected to each of said levers and actuated thereby to exert pressure against the inner periphery of said pneumatic tube, and links respec tively connecting said lovers to said axleengaging unit, each of said shoes having bearing lugs interposed between and on opposite sides of the pivotal bearings of the link and lever to which it is connected.

8. In a. resilient wheel, a tread unit, an axle contacting unit, a pneumatic tube arranged to resist relative movements between said units, pivotally connected links and levers for articulately connecting said units. and pressure shoes pivotally mounted on the pivotal. connections between said links and levers and bearing against said pneumatic tube.

9. In a resilient wheel, an outer rim. supports arranged in at lined dis tances from said rim, a pneumatic tube disposed between said rim, and said supports, the relative disposition oi? said rim and supports'being adapted to maintain said tube, with its outer and inner peripheries flattened, means disposed intermediately of said supports for exerting variable pressure on llU said connecting means under the rel la ness the flattened ,inner periphery ct said tube, an avlenn t, aml means inovablv connectling said supports to said axle unit and operating said variable pressure means.

at lined distances from said seat tor aniall flattening; the inner p; iplierv oi? said tube, an axially flattened ban il ,endinp; aroiuid ing said axle and trend units, axially tlattenegil variable pressure means operated by ative movement oi said units to exert variable pressure thru said band against the inner periphery of said pneumatic tube, and a pneumatic tube confined: between saiijl seat and said band,, said seat, supports, and variablepressure means being suitably disposed to maintain the outer and inner peripheriesvot said; pneumatic tubein axially flattened condition.

j 11., resilient wheel comprising axle contacting; and tread units, means articulatelv connecting said units, af ineurnatictube, saul units being provided with portions bearing against said {pneumatic tube and suitably formed tov impart a tlattenedfcontour to the inner and outer peripheries of said pneumatic tube, and means carried by said articulately connecting means tor bearing o the increased pressure area portion vided by onevot said flattened. peripheries.

12; lln a resilient wheel, an en -raging unit, a tread unit extending, around said axle-engaging unit, a; series 0t swinging leversvpivoted to one of said units, said levers having; means provided with operating surfaces in substantially circular alinement with their pivots, links pivotally connecting said levers respectively to the other unit for imparting movements to said operating surfaces with respect t said pivots, and. a pneumatic tube interposed between said tread unit and said levers, said, levers being; arranged in pairs with their corresponding ends coaxially pivoted. to the tread unit, and said links having their corresponding ends coairially pivoted in said axle-engaging member;

lln avresilient wheel, an axle-engaging; unit, a; tread ,unitextendinp; around said anic-engaging unit, a series oi? swinging levers pivoted to one of said units, said levers having; means provided with operating surfacesin substantially circular alinement with their-pivots, links pivotallvconnecting said-leversrespectively to the other unit for imparting movements to. said. oper ating esurfaces withnrespect to said pivots, and a l pneumatic tube interposed. (between said supports, means "for niovablv connect said tread unit and said levers, said levers being arranged in pairs with their correspondingi; ends coaxiall pivoted to the tread unit, and said linlts having their corresponding ends coaniallypivoted in said. axle-engaging; member, each of said levers andthe link connected thereto having a pivot hub portion arranged between the hub portions ot the link or lever connected thereto.

let. lln a resilient wheel, an axle-engaging; unit, a tread unit extending; around said ainle engapging unit, a series of swinging levers arrangedin pairs, each pair oi sai'l levers being pivoted. to one of said units on common axis and having; spaced pivot hub portions straddling; a pivot hub portion of the other lever, links connecting said levers to the other of said units, said links being arranged in pairs corresponding to said levers and each of said linkshaving divided hub portions at each end for providing elongated coaxial pivotal connection with the other link on said other unit and with the lever to which it is attached a wheel rim, and resilient means operating through sairl lev rs tor resisting; relative, displacement between said units. a v

15, In a resilient wheel, an axleengaginp; unit, a plurality of links pivoted thereto, a tread unit extending around said axle engaging unit, levers respectively connect inn; said links to said tread unit, wheel rim, and yieldable m eans interposed between said tread unit and said levers, each of said levers and links being provided with spaced coaxial pivot hub portions at each end, and an axially extending body portion from which said pivot hub portions project.

16. In a wheel, an airle-engaging unit, a tread unit surrounding said azrle engaging unit, one of said units including anially spaced tranies and a plurality oi journal pins uniting); said frames, a pair of levers ournaled on each of said journal pins, a system ol' links pivotally connecting said levers with the other of saidunits, and resilient means extending around said levers, said tread unit being provided with means between which and said leverssaid resilient means interacts.

1?. In a wheel, an axle-engaging unit, a tread unit surrounding said axle-engaging unit, one of said units including axially s liaced frames and a plurality oi? journal pins uniting frames, a pair of levers coaxially journaled on each oil said journalpins, pair of links pivotally connecting each pair of said levers with the other oi said units, each pair of links being coai rially plvoted on said other unit,-an d resilient means extendme; around sald levers, said tread unit being provided with means between which and said levers said resilient means interacts.

18, lln a wheel, aideengaging unit, a

t ad ni rminates aid w erl ee si e unit, said tread unit including axially spaced frames, journal pins connecting said frames, levers journaled on said pins, l s pivotallyv connecting said levers to said ato engaging unit, a series of: anchoring caps carried respectively by said journal pins, and yieldable meansdispmse-d between s. l

levers and portions carried by said tread unit, said yieldable means being anchored by'sa'ld anchoring caps.

19. In wheel, an axle-engaging unit, a

tread unit surroundin said axle-en 'a 'ina' C) C :3

I series of journals extending transversely between said rings, levers journaled on said journals, links pivotally connected at opposite ends to said levers and axle engaging unit, said levers being provided with axially spaced pivot hub portions, anchoring caps supported by said pivot hub portions and provided with lugs or bosses which engage saidjournals between said pivot hub por tions, resilient means extending around said levers and anchoring caps, and means carried by said tread unit and between which and said levers and shoes said resilient means is disposed.

21. In a resilient wheel, axlecontacting and tread units, a pneumatic tube for yieldably resisting relative displacement of said units, and means movably connecting: said units and bearing upon said pneumatic tube, the bearing portions of said connecting means in the concentric relation of said units i being normallydisposed to maintain flattened increased pressure areas of contact on said pneumatic tube.

funits and bearingxon said pneumatic Sald connecting means including a pair of levers coaxially pivoted to each of said sup- 22; In a resilient wheel, a tread unit having a seat for the periphery of a pneumatic tube, a series. of supports carried by said tread unit at fixed distances from said. seat, a pneumatic tube disposed between said seat and said supports, an axle contacting unit, and means for v,movably connecting said tube.

ports andlinks respectively connecting said levers to said axle contacting unit.

23.. In a resilient wheel, a tread unit having a seatfor the'periphery of'a pneumatic tube, a series 0t supports carried by said tread unit at fixed distances troin said seal. a pneumatiitube disposed between said soul and said supports, an axle contacting unit, and means for movably connecting said units and bearing on said pneumatic tube. said connecting means including a pair e." levers coaxially pivoted to each of said supports and links respectively connecting saul levers to said axle contactingunit. said links being; interchangeable.

In a resilient wheel, a tread unit, an axle-contacting unit, links and levers for movably connecting said units, 1; pneumatic tube, and a pressure shoe pivotall connected to each ol'said levers and bearing on said pneumatic tube, said shoes bein; n1ovuble by and relatively to the relative movc ments between said units.

25. In a resilient wheel, a tread unit. an axle contacting unit, one of said units being provided with transverse supports, a pneumatic tube extending around said sup orts. means acting under the constraint 0 said pneumatic tube for movablv connecting the other of said units to said transverse sup ports, a band interposed between said pneumatic tube on the one hand and said trans verse supports and connecting means on the other hand, and a cap interposed between each of said supports and said band.

26. I11 a resilient wheel, a tread unit, an axle contacting unit, one of said units being provided with transverse supports, a pneumatic tube extending around said sup ports. means acting under the constraint of said pneumatic tube for movably con necting the other of said units to said transverse supports, a band interposed between said pneumatic tube on the ne hand and said transverse supports and (Ol'lllGCtlllQ means on the other hand, and :1 cap interposed between each of said supports and said band, said caps being provided with lugs for centering said band with respect to said pneumatic tube-and the portions of said connecting means constrained thereby.

27. In a resilient wheel, relatively niovable tread and axle contacting units, one of said units being" provided with transversely arranged jonrnalling supports, a pneumatic tube extending around said jourualling supports, a band interposed between said pneumatic tube and said supports, levers ]OUI- .nalled on said supports and constrained in their movements by said pneumatic tube.

links pivotally connecting said levers to the other of said units, and caps bearing on said journalling supports and portions contiguous thereto, said caps extending over the bearing portions of said levers and holding said band from bearing thereon.

28. Ina resilient wheel, relatively movable axle contacting and tread units,n pneumatie tube, levers pivotally mounted on one fill matinee of said units links pivotelly mounted on the other of said units, pins to]? pivotelly connecting said links and levers, and pressure shots pivot-ally mounted on said pivotal pins and constrained in their movements by said pneinnetic tube for yieldablv resisting relative IHOYQDLGDtS between said units.

29. In a resilient wheel reletiVelamovehle trend and axle contacting members means for move-lily connecting seid units, said means being provided with portions adapted to hear on a pneumatic tube :tor reg relative movements between said units a seat for said pneumatic tube cmi'ied by one o-FE said units and pneumatic tube dis msed between said seat and the hearing;' portions of said connecting i'nenns the distance between said bearing portions of the connecting means and said seat when said units are in eoncentric relation being; relatively smell as compared to the nxiel extent of the flattened pneumatic [he confined between said seat and said hearing i mrtions oi the connecting means. i

30. ln a resilient wheel, 2. trend unit provided with a seat for a pneumatic tube, an axle contacting unit means for moiehly connecting said units including: members adapted to beer on said pneumatic tube and e pneumatic tube confined between said sent end bearing); members. said pneumatic tube in its cross section heiu oi? relatively small redial extent as compared to its axial width and havingaxially extended bearing contact with said hea ing members around an axially flattened periphery thereof.

ll JEILTUN T. WESTQN. 

